Sash centering and holding means.



W. S. TRASK.

sAsH GBNTBRING AND HOLDING MEANS.

APPLICATION FILED MAY 4, 1914.

1,129,530, Patented Feb. 23, 1915.

@NHL IIIIHIM HE MORRIS PETERS CO., FHOTO-LITHU WASHINGTON, D. c.

UNITED STATES PATENT OFFICE.

WILLIAM S. TRASK, OF NEW BRITAIN, CONNECTICUT, ASSIG-NO'R TO THEAMERICAN HARDWARE CORPORATION, OF NEW BRITAIN, CONNECTICUT, ACORPORATION OF CONNECTICUT.

Specification of Letters Patent.

Patented Feb. 23, 1915.

Application filed May 4, 1914. Serial No. 836,125.

To all whom it may concern Be it known that I, WILLIAM S. T1msn, acitizen of the United States, residing at New Britain, Hartford county,State of Connecticut, have invented certain new and useful Improvementsin Sash Centering and I-Iolding Means, of which the following is a full,clear, and exact description.

My invention relates to an improved centering and holding device fortransoms and the like.

The object of the invention is to provide a very effective and durablemeans of the character described.

It is a further object to provide an effective means for adjusting thetension of the holding means.

In the drawings, Figure 1 is a view of the rear side of my improved sashcentering and holding device. Fig. 2 is an edge elevation. Fig. 3 is across section through the center. Fig. 4 is a view of one of the partsdetached. Fig. 5 is a view of the other of the parts detached. Fig. 6 isa perspective view of one of the details of construction.

The centering device includes two hinged members pivotally connected. Inthis instance 1 represents a pivot, central with the hub 2 of one of thehinged members.

3 3 are arms on the hub 2, said arms being arranged to be secured, as byscrews, to

the transom sash or to the casing. The other member includes a hubportion 4 having a central passage for the pivot and having one or morearms 5 5 which may be secured to the transom sash or casing. The arms 33 and 5 5 are diagonally disposed so that all the arms may be swung intosubstantial parallelism, as shown in solid lines, Fig. 1, or may beswung into the position indicated by dotted lines, representing theposition of the sash relatively to the casing when the sash is o en.

pMany devices have been employed for frictionally retaining sashcentering devices in different positions, but owing to the fact thatsuch parts should be very powerfully retained to overcome the pressureof heavy drafts of air and to prevent rattling, the wear of such partsas heretofore constructed hasbeen very rapid, resulting in quicklyrendering the devices ineflicient. My improved construction comprehendsan improvement whereby there is great resistance to wear. The retainingmeans comprises an annular plate 6 mounted in a correspondingly shapedrecess in the hub 2 and surrounding the pivot 1. Any suitable means maybe provided to prevent the plate 6 from turning, for example, the platemay have lugs 7 7 which stand in offset recesses in said hub. In theexposed face of the plate 6 and arranged concentrically, are a series ofclosely arranged notches 8 8. In the hub 4 are a plurality of guidepassages which are preferably provided with steel bushings 9 9 in whichare located balls 10-10. The overall diameter of the balls 10 10 ispreferably in excess of the thickness of that part of the hub in whichthey stand, for the reasons hereinafter explained. The balls 10 10 arelocated at such a distance from the center of the hub 4 as to registerwith the notches 8 8.

11 is a steel spring washer plate designed to fit over the pin 1 andstands at the back of the hub 4. This spring plate 11 is so formed as toprovide at its periphery spring arms 12 12, said arms preferably beingcurved to follow the outline of the edge of the plate 11. These arms areprovided in a number corresponding to the number of balls 10-10employed, in this instance four. The plate 11 is so applied that aspring arm 12 will rest upon and press against a ball 10 so as to forcesaid ball against the steel plate 6 and so that it will be pressed intothat one of the notches therein in line therewith. The spring plate 11may be provided with any suitable means to prevent the plate frombecoming angularly dislodged, thereby maintaining the correctpositioning of the spring arms 12 and the complementary balls 1 0. Inthis instance the spring plate 11 is provided with lugs 13 13 which takeinto notches or recesses in the hub 4 adjacent to the recess in whichthe plate is located. The pivot stud or bolt 1 is screw-threaded and maybe provided with an adjusting nut 14 which may draw down against thespring plate 11 so as to vary the degree of pressure of the spring arms12 against the balls 10.

15 is a lock nut.

The notched plate 6, the spring plate 11, the balls 10-10 and thebushings 9 9 should be hardened sufficiently to resist wear.

When the parts are assembled, the spring arms 12-12 will force the balls10-10 into the notches 8 8 to thereby restrain the two members fromturning unless su'flicient force is applied to overcome the tension ofthe springs. When sufficient tension is applied, the two parts to whichthe two hinged members are connected may be moved relatively to eachother to the desired angle, that is to say, when the parts are in place,the transom may be pushed to a closed position, or pulled open to thedesired angle so that in whatever position it is left said transom willbe securely held against being swung or rattled by drafts of air. f

It is obvious that in supporting a transom there must be a pivot at eachsupporting point. Each end bearing of the transom may be provided with aduplicate means, such as described herein, or only one of said bearingsneed be provided with such a centering and holding means, the otherbearing being plain. It is also obvious that the plate 6 is in reality apart of the hub 2, although it is preferably formed of hardened-steelinstead of a material having a lesser wear -resisting capacity. Broadlyspeaking, therefore, said plate 6 is part of the hub 2, and in someinstances, in the event the hub 2 were made of steel for example, theplate and the hub portion could be integral, such a modification beingtoo ob- Vious t0 require illustration. So, also, if the hub 4 were madeof steel or the like, the bushings 9 9 might be omitted.

What I claim is:

1. In a sash centering and holding means, two hubs mountedconcentrically, a series of notches in the face of one hub, a pluralityof ball passages through the other hub arranged to register with saidnotches in the first. mentioned hub, balls in said passages, and meanscarried at the back of the second mentioned hub for applying pressure tosaid balls to force them into the notches of the lirst mentioned hub,said means comprising a steel washer plate including spring arms, withmeans for forcing said plate into engagement with the balls so as tovary the pressure against the balls.

2. ln a sash centering and holding means, two hubs mountedconcentrically, a series of notches in the face of one hub, a pluralityof ball passages through the other hub arranged to register with saidnotches, balls in said passages, a spring plate carried by the secondmentioned hub at the back of said balls, and pressing against aplurality of the latter with means to hold said plate against rotlationrelatively to said second mentioned hu 3. ln a sash centering andholding means, two hubs mounted concentrically, a series of notches inthe face of one hub, a plurality of ball passages through the other hubarranged to register with said notches, balls in said passages, a springplate carried by the second mentioned hub at the back of said balls, andpressing against a plurality of the latter with means to hold said plateagainst rotation relatively to said second mentioned hub, and with meansfor adjusting the pressure of said spring plate against said balls. n

TVVLLIAM S. TRASK.

Witnesses C. A. PARKER, F. B. CAswELL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

